我不断收到一个错误

Question

我一直在打码时得到popovercontroller错误，这里是我的代码：

- (IBAction)sharePost:(id)sender { 
    NSArray *activityItems; 
    NSInteger tid = ((UIControl *) sender).tag; 

    if ([catName isEqualToString:@"All"]) 
    { 
     //UIImage *snapshotImage = [self imageFromView:self.view]; 
     activityItems = @[[self.titleArray objectAtIndex:tid],[self.linkArray objectAtIndex:tid],[self.imageArray objectAtIndex:tid]]; 
    } 
    else 
    { 
     activityItems = @[[self.titleCatArray objectAtIndex:tid],[self.linkCatArray objectAtIndex:tid],[self.imageCatArray objectAtIndex:tid]]; 
    } 

    UIActivityViewController *activityController = 

    [[UIActivityViewController alloc] 

    initWithActivityItems:activityItems 

    applicationActivities:nil]; 

    [self presentViewController:activityController   
         animated:YES completion:nil];   
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

我想要得到它的工作在iPad上，我有在网上看了一切，但无法弄清楚。

Answer 1

在文档UIActivityViewController：

在iPad上，你必须在酥料饼呈现视图控制器。在iPhone和iPod touch上，您必须以模态形式呈现它。

尝试：

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { 
    UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:activityController]; 
    [popover presentPopoverFromRect:[sender bounds] 
          inView:sender   
      permittedArrowDirections:UIPopoverArrowDirectionAny   
          animated:YES]; 
    self.popover = popover; 
} else { 
    [self presentViewController:activityController 
         animated:YES 
        completion:nil]; 
}